[sane-devel] Pulstek OpticBook 3800 - problems with openning device on 1.0.23+

[Nikolay Shaplov]

>      since the ASIC used is a GL845, you should not try forcing it to
> 
> GL847. They are really different, and nothing will ever work. If you
> look at the GL845 datasheet, you'll see it is really close to the GL846.
> So close in fact that the same code should be able to run both.
> 

1. I've build git version with setting GL846 chipset to 3600 clone in the 
model description. It gives the same result as I wrote before

2. In 1.0.22 GL847 worked for me well. It stopped working in 1.0.23. So I 
think this is not an chipset issue. (if at least there were no great changes 
in genesys_gl847.c)

>      Since I added preliminary support for GL846 a couple of months ago,
> 
> you'd rather declare your scanner as a GL846 one like the
> canon_formula101_model.
I've tried... scanimage -L does not list scanner at all in this case O_o

Very strange for me... :-(((

>      Since having the ASIC datasheet isn't enough( GPIO, fontend, motors
> 
> change from one model to another and are not coverd by this
> documentation), the process to reach full support is to run the
> experimental backend and compare debugging output with USB logs recorder
> under windows, and tweak the code until it works.